// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
#define UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_

#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "ui/aura/client/focus_change_observer.h"
#include "ui/aura/window_delegate.h"
#include "ui/aura/window_observer.h"
#include "ui/base/cursor/cursor.h"
#include "ui/events/event_constants.h"
#include "ui/views/views_export.h"
#include "ui/views/widget/native_widget_private.h"
#include "ui/wm/public/activation_change_observer.h"
#include "ui/wm/public/activation_delegate.h"
#include "ui/wm/public/drag_drop_delegate.h"

namespace aura {
class Window;
}
namespace gfx {
class FontList;
}

namespace views {

class DropHelper;
class TooltipManagerAura;
class WindowReorderer;

class VIEWS_EXPORT NativeWidgetAura
    : public internal::NativeWidgetPrivate,
      public aura::WindowDelegate,
      public aura::WindowObserver,
      public aura::client::ActivationDelegate,
      public aura::client::ActivationChangeObserver,
      public aura::client::FocusChangeObserver,
      public aura::client::DragDropDelegate {
public:
    explicit NativeWidgetAura(internal::NativeWidgetDelegate* delegate);

    // Called internally by NativeWidgetAura and DesktopNativeWidgetAura to
    // associate |native_widget| with |window|.
    static void RegisterNativeWidgetForWindow(
        internal::NativeWidgetPrivate* native_widget,
        aura::Window* window);

    // Overridden from internal::NativeWidgetPrivate:
    void InitNativeWidget(const Widget::InitParams& params) override;
    void OnWidgetInitDone() override;
    NonClientFrameView* CreateNonClientFrameView() override;
    bool ShouldUseNativeFrame() const override;
    bool ShouldWindowContentsBeTransparent() const override;
    void FrameTypeChanged() override;
    Widget* GetWidget() override;
    const Widget* GetWidget() const override;
    gfx::NativeView GetNativeView() const override;
    gfx::NativeWindow GetNativeWindow() const override;
    Widget* GetTopLevelWidget() override;
    const ui::Compositor* GetCompositor() const override;
    const ui::Layer* GetLayer() const override;
    void ReorderNativeViews() override;
    void ViewRemoved(View* view) override;
    void SetNativeWindowProperty(const char* name, void* value) override;
    void* GetNativeWindowProperty(const char* name) const override;
    TooltipManager* GetTooltipManager() const override;
    void SetCapture() override;
    void ReleaseCapture() override;
    bool HasCapture() const override;
    ui::InputMethod* GetInputMethod() override;
    void CenterWindow(const gfx::Size& size) override;
    void GetWindowPlacement(gfx::Rect* bounds,
        ui::WindowShowState* maximized) const override;
    bool SetWindowTitle(const base::string16& title) override;
    void SetWindowIcons(const gfx::ImageSkia& window_icon,
        const gfx::ImageSkia& app_icon) override;
    void InitModalType(ui::ModalType modal_type) override;
    gfx::Rect GetWindowBoundsInScreen() const override;
    gfx::Rect GetClientAreaBoundsInScreen() const override;
    gfx::Rect GetRestoredBounds() const override;
    void SetBounds(const gfx::Rect& bounds) override;
    void SetSize(const gfx::Size& size) override;
    void StackAbove(gfx::NativeView native_view) override;
    void StackAtTop() override;
    void StackBelow(gfx::NativeView native_view) override;
    void SetShape(SkRegion* shape) override;
    void Close() override;
    void CloseNow() override;
    void Show() override;
    void Hide() override;
    void ShowMaximizedWithBounds(const gfx::Rect& restored_bounds) override;
    void ShowWithWindowState(ui::WindowShowState state) override;
    bool IsVisible() const override;
    void Activate() override;
    void Deactivate() override;
    bool IsActive() const override;
    void SetAlwaysOnTop(bool always_on_top) override;
    bool IsAlwaysOnTop() const override;
    void SetVisibleOnAllWorkspaces(bool always_visible) override;
    void Maximize() override;
    void Minimize() override;
    bool IsMaximized() const override;
    bool IsMinimized() const override;
    void Restore() override;
    void SetFullscreen(bool fullscreen) override;
    bool IsFullscreen() const override;
    void SetOpacity(unsigned char opacity) override;
    void SetUseDragFrame(bool use_drag_frame) override;
    void FlashFrame(bool flash_frame) override;
    void RunShellDrag(View* view,
        const ui::OSExchangeData& data,
        const gfx::Point& location,
        int operation,
        ui::DragDropTypes::DragEventSource source) override;
    void SchedulePaintInRect(const gfx::Rect& rect) override;
    void SetCursor(gfx::NativeCursor cursor) override;
    bool IsMouseEventsEnabled() const override;
    void ClearNativeFocus() override;
    gfx::Rect GetWorkAreaBoundsInScreen() const override;
    Widget::MoveLoopResult RunMoveLoop(
        const gfx::Vector2d& drag_offset,
        Widget::MoveLoopSource source,
        Widget::MoveLoopEscapeBehavior escape_behavior) override;
    void EndMoveLoop() override;
    void SetVisibilityChangedAnimationsEnabled(bool value) override;
    void SetVisibilityAnimationDuration(const base::TimeDelta& duration) override;
    void SetVisibilityAnimationTransition(
        Widget::VisibilityTransition transition) override;
    ui::NativeTheme* GetNativeTheme() const override;
    void OnRootViewLayout() override;
    bool IsTranslucentWindowOpacitySupported() const override;
    void OnSizeConstraintsChanged() override;
    void RepostNativeEvent(gfx::NativeEvent native_event) override;

    // Overridden from aura::WindowDelegate:
    gfx::Size GetMinimumSize() const override;
    gfx::Size GetMaximumSize() const override;
    void OnBoundsChanged(const gfx::Rect& old_bounds,
        const gfx::Rect& new_bounds) override;
    gfx::NativeCursor GetCursor(const gfx::Point& point) override;
    int GetNonClientComponent(const gfx::Point& point) const override;
    bool ShouldDescendIntoChildForEventHandling(
        aura::Window* child,
        const gfx::Point& location) override;
    bool CanFocus() override;
    void OnCaptureLost() override;
    void OnPaint(const ui::PaintContext& context) override;
    void OnDeviceScaleFactorChanged(float device_scale_factor) override;
    void OnWindowDestroying(aura::Window* window) override;
    void OnWindowDestroyed(aura::Window* window) override;
    void OnWindowTargetVisibilityChanged(bool visible) override;
    bool HasHitTestMask() const override;
    void GetHitTestMask(gfx::Path* mask) const override;

    // Overridden from aura::WindowObserver:
    void OnWindowPropertyChanged(aura::Window* window,
        const void* key,
        intptr_t old) override;

    // Overridden from ui::EventHandler:
    void OnKeyEvent(ui::KeyEvent* event) override;
    void OnMouseEvent(ui::MouseEvent* event) override;
    void OnScrollEvent(ui::ScrollEvent* event) override;
    void OnGestureEvent(ui::GestureEvent* event) override;

    // Overridden from aura::client::ActivationDelegate:
    bool ShouldActivate() const override;

    // Overridden from aura::client::ActivationChangeObserver:
    void OnWindowActivated(
        aura::client::ActivationChangeObserver::ActivationReason reason,
        aura::Window* gained_active,
        aura::Window* lost_active) override;

    // Overridden from aura::client::FocusChangeObserver:
    void OnWindowFocused(aura::Window* gained_focus,
        aura::Window* lost_focus) override;

    // Overridden from aura::client::DragDropDelegate:
    void OnDragEntered(const ui::DropTargetEvent& event) override;
    int OnDragUpdated(const ui::DropTargetEvent& event) override;
    void OnDragExited() override;
    int OnPerformDrop(const ui::DropTargetEvent& event) override;

protected:
    ~NativeWidgetAura() override;

    internal::NativeWidgetDelegate* delegate() { return delegate_; }

private:
    class ActiveWindowObserver;

    bool IsDocked() const;
    void SetInitialFocus(ui::WindowShowState show_state);

    internal::NativeWidgetDelegate* delegate_;

    // WARNING: set to NULL when destroyed. As the Widget is not necessarily
    // destroyed along with |window_| all usage of |window_| should first verify
    // non-NULL.
    aura::Window* window_;

    // See class documentation for Widget in widget.h for a note about ownership.
    Widget::InitParams::Ownership ownership_;

    // Are we in the destructor?
    bool destroying_;

    gfx::NativeCursor cursor_;

    // The saved window state for exiting full screen state.
    ui::WindowShowState saved_window_state_;

    scoped_ptr<TooltipManagerAura> tooltip_manager_;

    // Reorders child windows of |window_| associated with a view based on the
    // order of the associated views in the widget's view hierarchy.
    scoped_ptr<WindowReorderer> window_reorderer_;

    scoped_ptr<DropHelper> drop_helper_;
    int last_drop_operation_;

    // The following factory is used for calls to close the NativeWidgetAura
    // instance.
    base::WeakPtrFactory<NativeWidgetAura> close_widget_factory_;

    DISALLOW_COPY_AND_ASSIGN(NativeWidgetAura);
};

} // namespace views

#endif // UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
